Technical description and composition of the ROLSEN RL-22E1308FT2C TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-22E1308FT2C
Chassis / Version: JUC7.820.00085101
Panel: C215X14-E2-P (G2)
LED driver (backlight): JUG7.820.846
PWM LED driver: HAI7101PB
MOSFET LED driver: ME15N10-G
Power Supply (PSU): PW52057C REV: 01
PWM Power: LD7750RGR
MainBoard: JUC7.820.00085101
IC MainBoard: CPU: Mstar MSB101A, SPI FLASH GD25Q64BS, DRAM: H5TQ1G63EFR, Sound: YD1517P
Tuner: DT21WN-2A-E
RL-22E1308FT2C Specifications
ROLSEN RL-22E1308FT2C
General recommendations for TV LCD LED repair
If the RL-22E1308FT2C TV does not turn on, does not emit any sounds when turned on, as well as no indicators on the front panel are lit or blinking, there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in the standby power supply. After checking the mains fuse and power elements of the primary circuit of the PSU, you should also check the absence of a short circuit in the loads of the secondary rectifiers.
As a rule, switches in switching power supplies (SMPS) are quite reliable and rarely fail without reasons that should be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM microcircuit is checked by replacing it with a known good one.
In cases where the ROLSEN RL-22E1308FT2C TV has lost the image, but there is sound and all other functions are operational, there is a possibility of a malfunction of the LED driver (the converter for powering the backlight LEDs of the C215X14-E2-P (G2) panel). When you turn on the TV, the image may appear and disappear briefly. It should be borne in mind that with such manifestations, the LEDs themselves fail.
A malfunction in the backlight circuits often occurs due to an open circuit in the power supply circuit of the LED lines. It is required to disassemble the panel and check the LEDs themselves, the ration of their conclusions, as well as the reliability of the connections in the connectors and the ration of the connector pins.
Without a special current source, it is impossible to check the line of series-connected LEDs, and it is unsafe for them to use any voltage sources over 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken into the K / Z.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters and, if necessary, update the software (software).
Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: Mstar MSB101A, SPI FLASH GD25Q64BS, DRAM: H5TQ1G63EFR, Sound: YD1517P. Malfunctions in BGA chips are usually easy to detect by warm-up.
Before replacing the DT21WN-2A-E tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. You also need to make sure that the tuner and processor can exchange data via the I2C bus
Attention to users! Self-repair of the ROLSEN RL-22E1308FT2C TV without proper qualifications and experience can lead to its complete non-repairability!
Additional MainBoard Repair
The appearance of the MainBoard JUC7.820.00085101 is shown in the figure below:
JUC7.820.00085101 can be used in TVs:
BBK 22LEM-3082/FT2C (Panel C215X14-E2-P(G2)), BBK 24LEM-1004/T2C (Panel C236X13-E4-C(G2), BBK 19LEM-1004/T2C (Panel C185X14-E3-P (G2)), BBK 19LEM-1001/T2C (Panel M185X12-E1-P (G4) ), ROLSEN RL-19E1308T2C (Panel C185X14-E3-P(G2)), ROLSEN RL-22E1308FT2C (Panel C215X14-E2-P(G2)), ROLSEN RL-24E1302T2C (Panel C236X13-E2-C (G2) ).
External view of the power supply
Main features of the ROLSEN RL-22E1308FT2C device:
Installed matrix (LED panel) C215X14-E2-P (G2).
To power the backlight LEDs, the JUG7.820.846 LED driver is used, controlled by the HAI7101PB PWM controller. The keys of the ME15N10-G type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-22E1308FT2C TV is carried out by the PW52057C power module, or its analogs using LD7750RGR microcircuits.
MainBoard - the main board (motherboard) is a JUC7.820.00085101 module, using CPU chips: Mstar MSB101A, SPI FLASH GD25Q64BS, DRAM: H5TQ1G63EFR, Sound: YD1517P and others.
The DT21WN-2A-E tuner provides reception of television programs and tuning to channels.
ROLSEN RL-22E1308FT2C TV with LCD C215X14-E2-P (G2), diagonal size 22 "(56 cm) 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio 150,000: 1 is achieved by special control of the LEDs.The LED-panel of this TV has an edge-backlight made of LEDs - Edge LED.The design and technical capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution at 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal shaping occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
Speaker power 4 W (2x2 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768, 1920x1080.
The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 552x388x179 mm, without stand 552x346x50 mm.
TV weight: 4.2 kg.
Attention! Panel C215X14-E2-P (G2) LED TV ROLSEN RL-22E1308FT2C is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.